Malicious PDF — malware analysis report

Static analysis result for SHA-256 6446d61401231a03…

MALICIOUS

PDF

44.7 KB Created: 2020-10-16 12:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3329f2f6aac5dec725366f63cc6bab4a SHA-1: 82139cb6902b21fd760a25023d4189105f380a4b SHA-256: 6446d61401231a038f113ef9ff78d06069f1b0cc24b6b9a7bb12387c19b54734
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=samsung+smart+switch+apkmirror In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8951fe632df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874a38a9474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f895dc224184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8857c275d15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1028/4456/files/poduxiwovoxokezabel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0867/8814/files/maat_guiding_principles_of_moral_living.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6014/0476/files/apollonian_and_dionysian_views.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/yanxian_koi_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1029/3669/files/fundamentals_of_heat_and_mass_transfer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/rudolphs_shiny_new_year_big_ben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8116/3435/files/coral_reef_webquest_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/squid_external_anatomy_student_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0780/3029/files/pokemon_emerald_emulator_for_android_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5356/4583/files/7730048631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1324/6623/files/portsmouth_swim_team.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eeb805a-0b6c-48d4-982c-22089942649a/fuvozaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad657bc-9514-4c6f-8217-dd4ea65a954d/8863064907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f9af6c-8948-444a-b6b4-0b132a552beb/bejukufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255d3b3e-bf2a-4b27-97f0-37dba97a2778/mawexutokopud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 5576 bytes
SHA-256: dce302f38d1c3968534947c3542e5d3f26655114591cfc2f8ebfdc85a034e281
font_01_sfnt_off0000829c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829C 10140 bytes
SHA-256: b0569fea04dc063d7bca7487eb55c0e8c418fffd40b7e24ba209774eadfd7efa

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